Overhead Crane Scales: UK Selection and Setup Guide

Select the weighing system, not just the scale

An overhead weighing project starts with the crane, suspended load path and measurement purpose. A detachable unit may suit occasional weighing where enough vertical space remains. An integrated sensor may protect headroom or support a fixed display, but it transfers more design, installation and commissioning responsibility to the crane owner and system integrator.

For broader category choices that are not specific to a fixed crane installation, compare crane scales by capacity and compliance.

Start with the suspended load path

The suspended load path is the physical chain that carries force: crane structure, hoist or hook block, upper connection, weighing element, lower connection, lifting accessories and load. The proposed scale must be intended for its exact position in that chain. Its own mass and every adapter also become part of the total suspended load considered by the lift plan.

Granada Cranes' system overview is useful evidence that detachable scales, integrated sensing, handheld displays, large displays and data outputs are distinct architectures. It is not evidence that any particular retrofit fits another crane.

Measure headroom and mechanical fit as an assembly

Headroom loss is based on installed bearing-to-bearing geometry, not the enclosure height shown in a product photograph. Record the existing crane-hook bearing point, lowest permissible hook position and floor or obstruction clearance. Then add the exact upper fitting, scale or link, lower fitting, adapters and the articulation required by the manufacturer's drawing.

Mechanical checks for the survey

• Hook throat, shackle pin diameter, bearing surfaces and closure clearances.
• Whether the fittings can align freely without side loading, binding or contact with the housing.
• Rotation, swivel and anti-rotation requirements across the expected load orientation.
• Scale and adapter self-weight, manual-handling needs and storage when not installed.
• Clearance from the hook block, rope, sheaves, limit devices, structure and load at every required position.

Use a controlled dimensional drawing for the exact variant and proposed fittings. If the drawing, crane records or intended-use statement is missing, stop the fit decision rather than estimating from a listing or image.

Set capacity margin without inventing a percentage

There is no defensible universal capacity-margin percentage for every overhead crane scale. The competent lift-planning process must consider the heaviest item, lifting accessories below the crane, the scale and adapters, crane configuration, foreseeable dynamic effects and the ratings and restrictions of every component. HSE safe-lifting guidance says to establish the load, attachment method and equipment limits and not exceed the safe working load.

Keep these values separate in the specification:

• Weighing maximum: the stated upper measurement limit of the instrument.
• Marked load-bearing rating or SWL: the permitted structural use stated for the exact equipment and configuration.
• Crane and accessory limits: the applicable limits for the crane configuration and every item in the lifting system.
• Normal operating margin: the project-specific allowance established from manufacturer information, risk and the lift plan.

An alarm or displayed reading is not permission to approach or exceed any marked limit. Do not infer structural capacity, proof-load status or an ultimate factor from the weighing range.

Specify readability, accuracy and viewing conditions

Readability or display division is the smallest increment shown; it is not an accuracy tolerance. A useful procurement specification also states the required measurement uncertainty or permissible error, repeatability, linearity, minimum useful load, calibration range and the conditions in which those values must be met.

Suspended-load motion can change or destabilise an indication. Define whether the result will be taken only after the load is stationary, whether the manufacturer supports the required dynamic application, and how a stable value is identified. A hold function can freeze a displayed value, but it does not improve the underlying measurement or prove that the load was stable.

Display and recording questions

• Who needs to see the value, from which authorised operating position and under what lighting or glare?
• Are digit height, contrast, viewing angle and units legible at that position?
• Must the value be copied manually, repeated on a fixed display or sent to a data system?
• Does the record need a time stamp, unit, instrument identifier, stability flag or audit trail?

For a fuller explanation of tare, hold, peak, power and display choices across product classes, see digital hanging scale features.

Separate remote control, remote display and radio data

These terms describe different functions and should occupy separate rows in a tender. A remote control sends commands. A remote display or repeater receives and presents the indication. A telemetry or data interface transfers measurements to another system. One handset may combine functions, but only the exact manual can establish that.

A remote device may let a reading be viewed from a position chosen in the lift plan; it does not make standing beneath or near a suspended load acceptable. Treat any connection to crane controls, interlocks or overload functions as a safety-related integration question requiring specialist design evidence.

Allocate installation and integration responsibility

A seller listing is not an installation design. Before ordering, identify who signs off each boundary:

• Manufacturer or supplier: exact identity, intended use, ratings, drawings, instructions, operating limits and applicable conformity documents.
• Crane OEM, designer or system integrator: compatibility with the crane, load-path changes, geometry, controls, electrical work, markings and commissioning.
• Employer or equipment controller: risk assessment, lift planning, competent supervision, training, maintenance, inspections and records.
• Competent examiner: the appropriate examination scheme and written report for the installed lifting equipment and safety-critical parts.
• Metrology owner or calibration provider: measurement requirements, calibration method, uncertainty, checks and traceability.

HSE's LOLER overview places duties on those who own, operate or control lifting equipment, while HSE's PUWER overview covers suitability, maintenance, inspection, information and training for work equipment more broadly. The exact responsibilities depend on the installation and use; a scale supplier cannot discharge the duty holder's obligations with a generic compliance label.

Keep LOLER, PUWER and weighing evidence separate

HSE describes thorough examination as a safety-focused process by a competent person. UKAS LAB 14 distinguishes calibration from adjustment and verification and explains that calibration frequency is based on machine type, use, risk, tolerance and performance history. It does not impose one universal interval on every crane scale.

If weight determines price, payment or another listed regulated purpose, confirm the use and the exact instrument's status with a competent metrology adviser. UK Weighing Federation guidance on regulated purposes explains why a calibration certificate alone is not legal verification.

Document operating limits before purchase

Record an evidence source beside every acceptance criterion. “Industrial”, “heavy duty” and a housing material are not operating limits.

• Exact model and variant, intended use and position in the load path.
• Weighing maximum, minimum useful load, division, error or uncertainty criteria and calibration conditions.
• Load-bearing rating, approved fittings, self-weight, dimensions, articulation and prohibited load directions.
• Permitted static or dynamic use, motion limits and response to an abnormal event.
• Enclosure IP code, temperature, humidity, condensation, corrosion, chemicals, impact, heat and storage limits.
• Any hazardous-atmosphere classification for the exact equipment and installation.
• Power supply, charging conditions, battery state indication, radio conditions and data-interface limits.
• Inspection, maintenance, calibration, repair, spare-parts and end-of-life instructions.

An IP code covers specified solid and water ingress tests. The RS IP-rating guide explains the code structure, but it cannot supply a missing rating or prove resistance to condensation, salt, frost, impact or every outdoor exposure. Those limits must come from the exact manufacturer documentation and site assessment.

Use real documents to compare shortlisted systems

Current supplier and manufacturer pages show why architecture and variant identity matter. These examples are evidence of comparison fields, not endorsements and not proof for any other model.

When specialist engineering is needed

Stop the standard purchasing process and obtain crane-OEM, lifting-engineer, system-integrator or metrology input when any of the following applies:

• The scale's intended load-bearing use, rating, markings or exact model documents are unclear.
• An integrated pin, sheave, rope sensor, hook-block modification or permanent electrical installation is proposed.
• Available headroom requires changes to the hook block, fittings, rigging geometry or crane travel limits.
• The load may swing, rotate, shock load, pull sideways or be weighed while moving.
• The environment involves foundry heat, washdown, corrosion, outdoor storage, hazardous atmospheres or unusual temperatures.
• Radio or data output will connect to a PLC, crane control, alarm, interlock, inventory or billing system.
• The reading will be used for a regulated purpose or to make a safety-critical decision.
• Crane, accessory and instrument ratings or examination records do not agree.

A specialist review should produce an agreed load-path drawing, responsibility matrix, acceptance criteria, commissioning record and maintenance/examination/calibration plan. If the necessary evidence cannot be obtained, do not install the instrument in the lifting chain.

A practical overhead-scale selection workflow

1. Define the use: identify what is weighed, why, when and how the result will be used.
2. Draw the load path: include the crane, scale, adapters, lifting accessories and load.
3. Survey the envelope: measure installed headroom, clearances, articulation and operating positions.
4. Set ratings: have the competent planner establish the load basis and required operating margin from controlled information.
5. Set measurement criteria: state readability, uncertainty, useful range, stability, display and record requirements.
6. Set environmental and radio limits: use actual exposure and site conditions, not generic “outdoor” labels.
7. Assign responsibilities: name the designer, installer, duty holder, examiner and calibration owner.
8. Verify documents and commission: approve the exact variant, drawings, instructions, certificates, checks and records before operational use.

Common questions about overhead crane scales

These questions are drawn from current specialist-system pages and the HSE, UKAS and UKWF evidence cited below. Exact Google UK People Also Ask wording was not reliably captured, so the questions are not presented as a verbatim PAA transcript.

What is an overhead crane scale?

An overhead crane scale is a weighing instrument installed in, or connected to, the suspended load path of a bridge, gantry, jib crane or hoist. It may be a detachable below-hook scale or part of an integrated sensing system. Its reading is measurement information only; HSE lift-planning and equipment duties still apply to the complete crane, accessories, load and operation.

Can I fit a crane scale to an existing overhead crane?

Possibly, but compatibility must be established for the exact crane and scale. Check the manufacturer's intended use, upper and lower fittings, installed length, self-weight, alignment, ratings, clearances and any effect on controls or markings. A retrofit that changes the load path or crane system needs review by the crane OEM, system integrator or another competent specialist; supplier retrofit examples are not universal approval.

How much lifting headroom will I lose?

The lost headroom is the installed distance added between the crane's load-bearing point and the rigging connection, not merely the scale-body height. Add the upper fitting, scale or link, lower fitting, adapters and required articulation, then compare the full assembly with the existing hook-to-floor envelope. Use a controlled drawing for the exact configuration; there is no reliable generic allowance.

Is a remote control the same as a remote weight display?

No. A remote control sends commands such as zero, tare or hold; a remote display receives and shows weight data, while a telemetry interface can send data to another system. Confirm each function, range, line-of-sight, latency, units, battery and loss-of-signal behaviour in the exact model documentation. Remote operation does not make a suspended-load danger zone safe.

Does an overhead crane scale require a LOLER examination?

LOLER may apply to equipment and accessories used for lifting at work, but the exact treatment of an installed scale depends on its role and configuration. HSE says duty holders must ensure lifting operations are planned and lifting equipment is suitable and, where required, thoroughly examined by a competent person. The competent examiner should place the scale within the correct examination scheme; calibration is separate.

How often should the weighing function be calibrated?

There is no universal calibration interval for every overhead crane scale. Set the programme from measurement risk, required tolerance, frequency and severity of use, performance history, transport, environment, intermediate checks and manufacturer guidance. UKAS LAB 14 explains this risk-based approach; it does not turn one example interval into a blanket legal rule. Reassess after repair, overload, damage or unexplained drift.

Can the reading be used for selling goods by weight?

Only if the weighing application and exact instrument meet the requirements for that regulated purpose. UK Weighing Federation guidance identifies commercial transactions and other listed uses where an applicable verified instrument is needed. A calibration certificate, a CE/UKCA mark or a LOLER examination does not by itself establish legal-for-trade status; obtain metrology advice for the intended transaction.

What IP rating is suitable for outdoor use?

No single IP rating is automatically suitable for every outdoor installation. Start with the documented exposure—rain direction, jets, dust, condensation, temperature, corrosion, UV and cleaning—and match it to the exact enclosure rating and manufacturer limits. An IP code addresses specified solid and water ingress tests; it does not by itself prove resistance to salt, condensation, impact, frost or continuous outdoor storage.

Sources and evidence scope

Sources were reviewed on 19 July 2026. Official sources support the legal and measurement boundaries; supplier and manufacturer examples support only the architecture or exact-model fields attributed to them.

• HSE: Lifting Operations and Lifting Equipment Regulations overview
• HSE: Safe lifting by machine
• HSE: Thorough examinations and inspections of lifting equipment
• HSE: Provision and Use of Work Equipment Regulations overview
• UKAS LAB 14: Guidance on the calibration of weighing machines
• UK Weighing Federation: Regulated purpose
• RS: IP ratings guide